PDF malware analysis — malicious · 4d1de2a1d8d15708

MALICIOUS

PDF

70.2 KB Created: 2021-09-08 09:56:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: c0e2a236583050539550a8b429c10894 SHA-1: 7efee78adbcef3992a3d48ffc0a1c0f896966363 SHA-256: 4d1de2a1d8d157082740461978d40d536598a415b7a78eb6d9d93a43971e70ce

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample is identified as a PDF containing a link farm, with multiple heuristics indicating it points to compromised CMS uploads and disposable hosting. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent. While no scripts were directly extracted, the structure suggests an attempt to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier suspicious score 0.4326

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
External URI info PDF_URI

PDF contains an external URL action
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL http://schodylux.pl/userfiles/file/wizimovesow.pdf In PDF document text
- https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/bd0e56fce09b257961fce26965e9c234/dexasotidebolijeti.pdfIn PDF document text
- http://oguzlarotomatiksanziman.com/depo/sayfaresim/file/litofifisogutemalipix.pdfIn PDF document text
- http://mizuho-co.net/file/ck/files/36183157271.pdfIn PDF document text
- http://purepoem.com/resource/docContentImg/file/2021-08-03/6a3a18cff8d228d12581cc912a14a435.pdfIn PDF document text
- https://mimpiindah1.com/contents//files/81142191314.pdfIn PDF document text
- http://tomasmrazek.cz/userfiles/file/1490091204.pdfIn PDF document text
- https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/8462da0257e2ede3bd880317403abd06/reperudavupukivubekuwasu.pdfIn PDF document text
- https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/2a2b44f59a516fcbb655c4ba62d8213c/nudijoropapitub.pdfIn PDF document text
- https://vanrun-it.nl/userfiles/files/kirarusobifirogisur.pdfIn PDF document text
- http://mrs-edu.com/sribati/editor/uploadfiles/kenobejedovori.pdfIn PDF document text
- https://xn----8sbcehyodmtf1czh.xn--p1ai/userfiles/file/telape.pdfIn PDF document text
- http://bekescsaba.varosom.hu/userfiles/files/56195798762.pdfIn PDF document text
- https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/fhg6ubejcgo3oh6j7s7oui1ce3/pidiguf.pdfIn PDF document text
- https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160c8aba3a27c4---1276548889.pdfIn PDF document text
- http://eros-arena-reutlingen.de/eros/userfiles/file/9659435443.pdfIn PDF document text
- http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a25cce9f43f---dasirakaxig.pdfIn PDF document text
- http://sanarina.de/ckfinder/userfiles/files/fudowimewole.pdfIn PDF document text
- http://asbufestival.com/uploads/FCK_files/file/41244429479.pdfIn PDF document text
- https://samsungdvm.net/upload/ckfinder/files/61323270271.pdfIn PDF document text
- http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160833328a261b---75359438474.pdfIn PDF document text
- http://boxerdapolenta.com/cmsimple/images/file/velawulivegefikeduwepisu.pdfIn PDF document text
- https://evboosters.com/wp-content/plugins/super-forms/uploads/php/files/14bd386f0fd7c9f2d7115ab4126a75e1/nubovudepufu.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=msc+chemistry+books+pdfPDF link annotation
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d24f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD24F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000ea66.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEA66	10912 bytes
SHA-256: `07cdd3fe9da9b1b1351c6b27d1aafbc210953a3bd651b9b10d4f0e61f1983805`

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